
I happen agree about the training. Classrooms in space is not economical in any way when the facilities already exist dirt side with unused space. A room is a room is a room. Unless training for space walking for say ship repairs. Then again with contra grav, I do not see why one could not have this planetside as well where the population is. If the TQ does not already have such a facility planetside, I do not see why anyone of them would not, as they all have space based manufacturing for the most part(exception nuncio, we know Dresden has quite a bit of space based infrastructure), may need to add additional rooms. Said SLN ships exist, could use part of them turning say the gym into a practice facility for 0g space walking. Boat bay procedures etc. Of course you could also use part of a orbital warehouse for the exact same thing.
Of course why would every planet not already have such practice facilities if they have orbital space facilities?
Most practice facilities are woefully under utilized where they spend the majority of their time idle.
I would expect such "training" facilities already exist on all planets making said SLN expensive ships redundant.
I would conclude that SLN ships will never be used as "training facilities" except to blow them up and practice damage control/damage repair.
Give them to other worlds? Let them learn on the fly? Sure why not. Could buy some goodwill. Thousands of planets out there with little more than pop guns who would be willing to buy them. Now how useful such ships would be to them on the other hand.

Relax wrote:
Every RMN ship in mothballs is going to be pulled out and utilized as it is better than SLN ... anything ... to cover their own territory.
As I have said all along. SLN ships will be sent to friendly Alliance worlds that currently have nothing(Entire SL, core, shell, prtotectorates) and will have nothing for many years to come. It is called on the job training for them. Ain't perfect, but it is better than waving a white flag.
SLN ships will not be used for "education centers".
SLN ships will not be used as hospitals where you cannot get to them in a timely fashion.
SLN ships will not be used as hospitals where your family cannot visit in a timely and INEXPENSIVE fashion.
SLN ships will not be used as hospitals when you can simply extract said equipment from the ship and install in pre existing HOSPITALS with pre existing hospital doctoral, nursing, orderly, outpatient care logistics paths.
SLN ships will not be used as hospitals where one cannot get two hospital beds past each other in the same hallway.
If anyone actually read this whole thing... Cheers.